Science

Identify the percent yield when 28.16 g of CO2 are formed from the reaction of 456.93 g of C8H18 with 256.0 g of O2.
2C8H18 + 25O2 → 16CO2 + 18H2O

  1. 👍 0
  2. 👎 0
  3. 👁 87
  1. This is a limiting reagent problem (LR). The LR must be identified first
    2C8H18 + 25O2 → 16CO2 + 18H2O

    1a. mols C8H18 = g/molar mass = 456.93/114 = approx 4, Check that.
    1b. mols O2 = 256/32 = approx 8. Check that.
    2a.. From 1a, how many mols CO2 can be formed. That's approx 4 mols C8H18 x (16 mols CO2/2 mols C8H18) = approx 4*16/2 = about 32 mols or in grams that's 32 x 44 gCO2/mol = about 1400. Check that number.
    2b. From 1b, how many mols CO2 can be formed. That's approox 8 mols O2 x (16 mols CO2/25 mols O2) = 8*16/25 = about 5.12 moles and that converted to g CO2 is 5.12 x 44 g CO3/mol = 225.Check that number.

    The LR is the material (C8H18 or O2) which produces the LEAST amount of CO2.. That's O2 in this case so the theoretical yield (TY) is approx 225 g .CO2 The actual yield (AY) from the problem is 28.16 g.
    %yield = (AY/TY)*100 = ?

    Check all of these calculations. It's late and my eyes are squinting.
    Post your work if you get stuck.

    1. 👍 0
    2. 👎 0

Respond to this Question

First Name

Your Response

Similar Questions

  1. chemistry

    2.2. Billions of kilograms of urea, are produced annually for use as a fertilizer. The reaction used is given below. NH3(g) + CO2(g) → CO(NH2)2(s) + H2O(l) The typical starting reaction mixture has a 3:1 mole ratio of NH3 to

    asked by mandla on August 24, 2016
  2. CHEMISTRY

    Methanol(CH4O),used in racing cars,burns O2 to form CO2and H2O. 2CH4O(l) + 3O2(g)-->2Co2(g) +4H2O(g) 32.0g/mol 32.g/mol 44.g/mol 18.g/mol What is the theoretical yield of CO2 from 48 g of methanol? What is the percent yield of CO2

    asked by cathy on April 12, 2010
  3. Chemistry

    Calculate the percent yield of iron if 950 g of Fe3O4 underwent the reaction shown in the chemical equation below and 533 g of Fe was isolated from the reaction mixture. Fe3O4 (s) + 2 C(s) ----> 2 CO2 (g) + 3 Fe(s) 1). 25.9% 2).

    asked by Van jan on April 11, 2007
  4. Chemistry

    The reaction: H2C2O4 + CuO + Heat = ? This reaction was produced in organic elemental analysis to identify C and H. So I think CO2 is formed to react with Ca(OH)2 to giving CaCO3. Additionally was formed H2O, so I though H2 or H2O

    asked by Carlos on November 26, 2014
  5. chemistry

    Give the percent yield when 15.9 g of CO2 are formed from the reaction of 4.000 moles of C8H18 with 4.000 moles of O2. 2 C8H18 + 25 O2 -> 16 CO2 + 18 H2O

    asked by candace on February 28, 2010
  6. CHEM

    1. How many moles of water can be made from 4 moles of oxygen gas and 16 moles of hydrogen gas? What is the limiting reagent? 2. Calculate the mass of water produced from the reaction of 24.0 g of H2 and 160.0 g of O2. What is the

    asked by Anonymous on June 1, 2008
  7. chemistry

    a.Given the equation: 2CaCO3 + 2SO2 + O2 -> 2CaSO4 + 2CO2 What is the actual yield of CO2 if 7.5 mol of O2 gives a percent yield of 80%? b. The pollutant sulfur dioxide can be removed from the emissions of an industrial plant by

    asked by Tsunayoshi on July 27, 2014
  8. Chemistry

    What is the percent yield of CO2 if the reaction of 10.0g of CO with excess O2 produces 12.8g of CO2?

    asked by Larry on October 9, 2009
  9. chemistry

    for the reaction of 14.69 g of ethyl alcohol with 22.5 g of oxygen. which is the limiting reagent? how much CO2 will be produced? if 19.5 g of CO2 is actually produced, what is the percent yield? C2H5OH(1) + 3 O2 (g) - 2 CO2 (g) +

    asked by alex on March 26, 2013
  10. Chemistry

    For the reaction of 2 HCl + Na2CO3 -> H2O + CO2 + 2 NaCl, how can I visually identify the limiting reagent, without any calculations? If I have a very high percent yield, what would be a good reason for it, considering that the

    asked by Benjamin on January 18, 2017

More Similar Questions